Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1226
CALL
Hormel Foods
HRL
$13.8B
| $5.69M | ﹤0.01% |
184,000
+33,900
| +23% | +$1.01M |
|
1227
PUT
AngloGold Ashanti
AU
$39.7B
| $5.69M | ﹤0.01% |
153,300
-294,900
| -66% | -$9.06M |
|
1228
CALL
Sphere Entertainment
SPHR
$4.77B
| $5.68M | ﹤0.01% |
173,700
-54,800
| -24% | -$2.23M |
|
|
PARA
1229
CALL
DELISTED
Paramount Global Class B
PARA
| $5.68M | ﹤0.01% |
474,500
-149,000
| -24% | -$1.67M |
|
1230
PUT
Macy's
M
$6.14B
| $5.67M | ﹤0.01% |
451,800
-480,200
| -52% | -$6.97M |
|
1231
PNC Financial Services
PNC
$99.5B
| $5.67M | ﹤0.01% |
32,279
+24,060
| +293% | +$4.54M |
|
1232
CALL
Hasbro
HAS
$12.4B
| $5.66M | ﹤0.01% |
92,100
-47,600
| -34% | -$2.88M |
|
1233
CALL
PACCAR
PCAR
$68.8B
| $5.64M | ﹤0.01% |
57,900
-29,900
| -34% | -$3.15M |
|
1234
PUT
Cal-Maine
CALM
$4.18B
| $5.63M | ﹤0.01% |
62,000
+43,100
| +228% | +$4.25M |
|
1235
CALL
Hertz
HTZ
$603M
| $5.62M | ﹤0.01% |
1,425,900
+925,000
| +185% | +$3.71M |
|
1236
CALL
BWX Technologies
BWXT
$16.2B
| $5.61M | ﹤0.01% |
56,900
-3,500
| -6% | -$380K |
|
1237
PUT
Johnson Controls International
JCI
$87.4B
| $5.61M | ﹤0.01% |
70,000
-63,700
| -48% | -$5.24M |
|
1238
PUT
GXO Logistics
GXO
$6.05B
| $5.6M | ﹤0.01% |
143,200
+128,200
| +855% | +$5.35M |
|
1239
State Street SPDR S&P Bank ETF
KBE
$1.63B
| $5.58M | ﹤0.01% |
105,468
+38,478
| +57% | +$2.16M |
|
1240
CALL
Klaviyo
KVYO
$4.69B
| $5.57M | ﹤0.01% |
184,200
+62,300
| +51% | +$2.51M |
|
1241
CALL
Genuine Parts
GPC
$16.6B
| $5.56M | ﹤0.01% |
46,700
+8,400
| +22% | +$1.01M |
|
|
EXAS
1242
CALL
DELISTED
Exact Sciences
EXAS
| $5.56M | ﹤0.01% |
128,500
-17,100
| -12% | -$866K |
|
1243
PUT
Equity Residential
EQR
$25.6B
| $5.56M | ﹤0.01% |
77,700
+67,600
| +669% | +$4.77M |
|
|
1244
CALL
PNC Financial Services
PNC
$99.5B
| $5.55M | ﹤0.01% |
31,600
-40,300
| -56% | -$7.61M |
|
1245
CALL
KeyCorp
KEY
$24.4B
| $5.55M | ﹤0.01% |
347,000
-400,200
| -54% | -$6.79M |
|
1246
CALL
Cytokinetics
CYTK
$11.1B
| $5.54M | ﹤0.01% |
137,800
-174,100
| -56% | -$8M |
|
1247
PUT
Core Scientific
CORZ
$7.62B
| $5.52M | ﹤0.01% |
762,400
-673,100
| -47% | -$7.66M |
|
1248
CALL
Sherwin-Williams
SHW
$76.6B
| $5.52M | ﹤0.01% |
15,800
-5,000
| -24% | -$1.75M |
|
1249
CALL
Stanley Black & Decker
SWK
$13.6B
| $5.51M | ﹤0.01% |
71,700
+44,300
| +162% | +$3.73M |
|
1250
PUT
The Mosaic Company
MOS
$7.08B
| $5.51M | ﹤0.01% |
204,000
-352,700
| -63% | -$9.33M |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.